Home / 30,615.54-42,224.37-21,570.87

Finding the Fourth Proportional to 30,615.54, 42,224.37 and 21,570.87

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Solution

The fourth proportional to 30,615.54, 42,224.37 and 21,570.87 is: 29,750.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,615.54 : 42,224.37 = 21,570.87 : x
  2. Step 2: Convert to fraction form
    30,615.54/42,224.37 = 21,570.87/x
  3. Step 3: Cross multiply
    30,615.54x = 42,224.37 × 21,570.87
  4. Step 4: Simplify right side
    30,615.54x = 910,816,396.10
  5. Step 5: Solve for x
    x = 910,816,396.10/30,615.54
  6. Step 6: Final answer
    x = 29,750.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.